Proceedings of the second Pan American scientific congress : food and efficiency / by Wiley, Harvey W.

Subjects:

Proceedings of the second Pan American scientific congress : methods and cost of obtaining crude petroleum in California / by Cox, Thomas

Subjects:

Proceedings of the second Pan American scientific congress : Bolivian tin and its relation to the United States / by Bancroft, Howland

Subjects:

Proceedings of the second Pan American scientific congress : the occurrence and preparation of radium and associated metals / by Parsons, Charles L.

Subjects:

Proceedings of the second Pan American scientific congress : improvement in mining and metallurgy an aid to conservation / by Ricketts, L. D.

Subjects:

Proceedings of the second Pan American scientific congress : the storage and handling of explosives in mines / by Munroe, Charles E.

Subjects:

Platinum-group elements: petrology, geochemistry, mineralogy by Mungall, James E.

Subjects: “…393 GEOLOGIA ECONOMICA…”

Proceedings of the second Pan American scientific congress : standard methods of sampling and analysis and standard samples / by Hillebrand, W.

Subjects:

Proceedings of the second Pan American scientific congress : the coals of Brazil / by White, I. C.

Subjects:

Proceedings of the second Pan American scientific congress : the mineral production of Latin America / by Roush, G. A.

Subjects:

Proceedings of the second Pan American scientific congress : mining in Ecuador / by Mercer, J. W.

Subjects:

Proceedings of the second Pan American scientific congress : drying oils produced in the Americas / by Gardner, Henry A.

Subjects:

Proceedings of the second Pan American scientific congress : paint for Latin American countries / by Toch, Maximilian

Subjects:

Proceedings of the second Pan American scientific congress : metallurgy of tin ores in Bolivia / by Hollister, Scoville E.

Subjects:

Proceedings of the second Pan American scientific congress : chemical research as a directing aid in the efficient utilization of pine forests / by Herty, Charles H.

Subjects:

Proceedings of the second Pan American scientific congress : the field for cyaniding in South America / by Megraw, Herbert A.

Subjects:

Proceedings of the second Pan American scientific congress : a simple efficient, and economic filter, its application to the filtration of the yellow precipitate in phosphoric-acid... by Kellogg, E. H.

Subjects:

Proceedings of the second Pan American scientific congress : saving of coal through the employment of better mining methods / by Haas, Frank

Subjects:

Proceedings of the second Pan American scientific congress : standard methods for sampling and analyzing coal / by Fieldner, A. C.

Subjects:

Proceedings of the second Pan American scientific congress : iron ores of the Americas / by Leith, C. K.

Subjects: